Army MOS Career Guide

91P — Self-Propelled Artillery Systems Mechanic:
Civilian Career Guide

Army 91P experience combines tracked-vehicle recovery, diesel power packs, transmissions, suspension, steering, brakes, hydraulics, electrical systems, turrets, fire control, suppression, filtration, diagnostics, and maintenance leadership. Civilian paths lead to heavy-equipment, diesel, industrial-machinery, electronics, and maintenance-supervision roles. Military armament work does not grant civilian firearms, explosives, manufacturer, or inspection authority.

Army MOS · Chapter 10C pages 314-315 verified

BLS May 2025 heavy-equipment, diesel, industrial, electronics, and supervision wages

Weapons access, commercial repair authority, and employer qualification do not transfer automatically

Army Chapter 10C note

Chapter 10C identifies 91P as Self-Propelled Artillery Systems Mechanic, an ACASP-designated MOS effective October 2025. The MOS performs field maintenance and recovery on M109-series howitzers, M992 ammunition carriers, and M88A1 recovery vehicles. Its scope includes diesel power packs, fuel, induction, exhaust, cooling, starting and charging, transmissions, suspension, steering, brakes, hydraulics, electrical systems, turret and carriage armament, fire control, suppression, filtration, diagnostics, BDAR, recovery operations, supervision, and technical guidance.

Start Here

Choose the part you need first.

Heavy Equipment Mechanic$47k – $94kClosest mechanical path

Diesel Service Technician$45k – $89kStrong powertrain path

Industrial Machinery Mechanic$46k – $95kBroad plant-maintenance option

Industrial Electronics Repairer$47k – $106kBest for electronics-heavy records

Maintenance Supervisor$50k – $127kBest for senior maintainers

See full role breakdowns: demand data, hiring notes, and employer expectations →

Translate the Platform by Subsystem

Show employers whether your strongest evidence is powertrain, hydraulics, recovery, electronics, or shop leadership.

Separate automotive, turret, fire-control, inspection, and recovery scope before choosing a civilian maintenance lane.

Build My 91P Blueprint →

Section 01

Top Civilian Role Matches for 91P

Heavy Equipment Mechanic Closest mechanical path

$47k – $94k

Tracked chassis, diesel power packs, transmissions, suspension, steering, brakes, hydraulics, electrical systems, recovery, and field diagnostics create the closest 91P bridge. Construction firms, equipment dealers, mining companies, utilities, ports, rail organizations, municipalities, and contractors hire heavy-equipment mechanics. Military platform qualification does not create manufacturer certification or commercial inspection authority. Quantify vehicles, engine hours, services, inspections, test equipment, faults, major assemblies, recoveries, labor hours, turnaround time, repeat repairs, and fleet availability.

Heavy equipmentTracked vehiclesHydraulicsRecovery

Closest mechanical path

Source: BLS OEWS May 2025 national wage tables · Median $65,510; 10th to 90th percentile $46,820 to $94,460

Diesel Service Technician

$45k – $89k

Compression-ignition engines, fuel delivery, induction, exhaust, cooling, starting, charging, and power-pack work translate directly to diesel service. Truck fleets, transit agencies, equipment dealers, generators, marine operators, and industrial service companies hire diesel technicians. Tracked-platform experience may not include highway emissions, electronic engine controls, or customer fleet procedures. Show engines, hours, fault codes, pressure or electrical tests, fuel issues, repairs, rebuild scope, road or load checks, and first-time fix rate.

DieselFuel systemsCoolingElectrical

Strong powertrain path

Source: BLS OEWS May 2025 national wage tables · Median $61,770; 10th to 90th percentile $44,530 to $88,740

Industrial Machinery Mechanic

$46k – $95k

Automatic transmissions, hydraulic circuits, rotating assemblies, pumps, electrical power, cooling, and systematic troubleshooting can transfer into industrial maintenance. Manufacturers, processing plants, utilities, warehouses, and service contractors hire industrial machinery mechanics. Employers may require programmable-controls, production-line, or lockout-tagout experience beyond Army vehicle maintenance. Quantify schematics, pressure and electrical measurements, faults, components, alignments, preventive work, downtime, repair duration, repeat failures, and safe return to operation.

Industrial maintenanceHydraulicsPowertrainTroubleshooting

Broad plant-maintenance option

Source: BLS OEWS May 2025 national wage tables · Median $64,520; 10th to 90th percentile $46,120 to $95,170

Industrial Electronics Repairer

$47k – $106k

Fire-control, turret-drive, charging, track electrical, sensors, test equipment, and fault isolation can support industrial-electronics roles when the 91P record contains real electrical depth. Manufacturers, utilities, transportation operators, service firms, and defense contractors hire repairers. Armament-system operation alone is not electronics repair expertise. Document releasable circuits, instruments, voltage or continuity checks, wiring, connectors, faults, authorized replacements, calibration checks, restoration time, and technical-data use without disclosing weapon capabilities.

ElectronicsFire controlTMDEWiring

Best for electronics-heavy records

Source: BLS OEWS May 2025 national wage tables · Median $74,090; 10th to 90th percentile $46,840 to $105,590

Maintenance Supervisor

$50k – $127k

Senior 91Ps assign workload, inspect automotive and armament repairs, direct recovery, guide technicians, prioritize readiness, and enforce safe shop operations. Heavy-equipment fleets, transit organizations, utilities, manufacturers, dealers, and contractors hire maintenance supervisors. Civilian leadership roles may require budgeting, labor relations, software, or regulatory experience beyond the MOS. Quantify technicians, shifts, assets, work orders, backlog, labor hours, recoveries, parts, inspection findings, safety, turnaround, first-time fix rate, and availability.

SupervisionFleet maintenanceRecoveryQuality

Best for senior maintainers

Source: BLS OEWS May 2025 national wage tables · Median $79,860; 10th to 90th percentile $49,600 to $126,790

Section 02

Transferable Strengths: What Civilian Fleet Employers See

Tracked Powertrain Diagnostics

91Ps isolate faults across diesel engines, transmissions, final drives, cooling, starting, charging, and controls. Employers read this as heavy-equipment diagnostic depth. Quantify assets, tests, faults, assemblies, and restoration time.

Hydraulic and Mechanical Systems

Steering, brakes, suspension, turret drives, and support systems combine pressure, mechanical, and control functions. Employers read this as subsystem troubleshooting. Show instruments, pressure checks, leaks, components, adjustments, and verification.

Vehicle Recovery Operations

The MOS includes recovery planning and execution for disabled tracked assets. Employers read this as high-risk field coordination. Quantify recoveries, equipment, distance, conditions, time, safety controls, and successful turnover.

Fire-Control Fault Isolation

Associated fire-control work can demonstrate electrical, electronic, sensor, and test-equipment discipline. Translate only releasable functions. Quantify instruments, circuits, faults, components, verification steps, and restored readiness.

Maintenance Leadership

Experienced 91Ps supervise troubleshooting, repairs, inspections, BDAR, and recovery. Employers read this as fleet leadership. Quantify people, work orders, labor hours, backlog, training, quality, safety, and availability.

Section 03

Common Mistakes 91P Veterans Make

Leading with the howitzer instead of the systems

Civilian employers rarely maintain M109 platforms, but they do hire for diesel, transmission, hydraulic, suspension, electrical, recovery, and diagnostic skill. Break the platform into those systems and prove work volume and outcomes.

Overstating fire-control or armament authority

Military maintenance qualification does not automatically authorize civilian firearms, explosives, manufacturer, warranty, engineering, or inspection work. Translate releasable electronics and quality functions, then state any civilian authorization separately.

Treating BDAR as a permanent repair standard

BDAR proves rapid assessment and constrained recovery, but temporary battlefield repairs may not satisfy civilian codes, warranties, or original-equipment procedures. Emphasize risk assessment, safe restoration, escalation, and final turnover rather than permanent authority.

Section 04

Credentials That Improve Civilian Marketability

ASE Medium/Heavy Truck Certification

Cost $34 registration plus $62 per standard testTime Pass selected T-series exams and document required hands-on experienceFormat Professional vehicle-service certification; recertification required

ASE Medium/Heavy Truck Certification can translate diesel, drivetrain, suspension, brakes, and electrical experience into language fleet employers recognize. Candidates should choose test areas that match documented work rather than assuming tracked-vehicle experience covers every highway-truck system.

Fleet signal · Best for diesel and heavy-vehicle roles

SMRP Certified Maintenance and Reliability Technician (CMRT)

Cost $250 member; $300 nonmember; $195 veteran examTime Application and competency-based exam; experience strongly recommendedFormat Professional maintenance certification

SMRP Certified Maintenance and Reliability Technician (CMRT) can support industrial and fleet-maintenance applications by validating preventive, predictive, corrective, and troubleshooting practices. It does not replace employer equipment qualification or manufacturer training.

Maintenance signal · Best for industrial and reliability paths

OSHA 10-Hour or 30-Hour Outreach Training

Cost Authorized-provider fees varyTime 10 or 30 instructional hoursFormat Voluntary outreach card, not a certification or license

OSHA 10-Hour or 30-Hour Outreach Training can provide recognizable baseline safety vocabulary for construction or general-industry shops. OSHA states that Outreach training is voluntary and does not replace employer-required, site-specific, or standard-specific training, so it should not be marketed as proof of full compliance authority.

Safety signal · Useful when entering civilian worksites

Section 05

Resume Translation: From Artillery Systems Repair to Heavy Equipment Maintenance

Translate the weapon platform into powertrain, hydraulic, electrical, recovery, inspection, and fleet-availability evidence.

Before: Military-centered language

Maintained M109 howitzers, M992 ammunition carriers, M88 recovery vehicles, armament, and fire-control systems.

After: Civilian employer language

Heavy-equipment mechanic with [years] maintaining [number] tracked vehicles and support assets across diesel power packs, transmissions, fuel, cooling, suspension, steering, brakes, hydraulics, electrical, and control systems. Completed [number] inspections and [number] work orders, using [TMDE or diagnostic tools] to isolate [number] mechanical, hydraulic, electrical, or electronic faults. Repaired or replaced [components], restored assets within [time], and improved first-time fix rate to [percent] while sustaining [availability rate]. Planned or executed [number] recoveries with [safety result], inspected [number] repairs, and trained [number] technicians to [qualification result]. Civilian firearms, explosives, manufacturer, warranty, and inspection authority are listed separately from Army qualifications.

The 91P Translation Formula

Military term	Civilian translation	Proof to show
M109 / M992 platform	tracked heavy-equipment powertrain and chassis system	assets, hours, work orders, availability
Power pack	integrated diesel engine and drivetrain assembly	units, faults, removals, repair time
Turret drive	hydraulic and electromechanical positioning system	tests, pressures, components, verification
Fire-control system	protected electronic sensing and control equipment	instruments, faults, repairs, function checks
Recovery operations	disabled-equipment extraction and safe field recovery	recoveries, conditions, time, incidents

Always quantify vehicles, engine hours, inspections, work orders, tests, faults, assemblies, labor hours, recoveries, restoration time, repeat repairs, trainees, and availability

Sources reviewed on 2026-07-21: BLS OEWS May 2025, ASE registration and test fees, SMRP CMRT, OSHA Outreach FAQs. Salary bands use May 2025 BLS national 10th to 90th percentile estimates rounded for planning. Local pay, manufacturer qualification, commercial inspection authority, weapons or explosives access, safety training, and employer requirements vary.

Section 06

91P Civilian Career FAQs

What civilian jobs fit Army MOS 91P?

Strong paths include heavy-equipment mechanic, diesel service technician, industrial machinery mechanic, industrial electronics repairer, and maintenance supervisor. The best match depends on powertrain, hydraulic, electrical, fire-control, recovery, inspection, and leadership depth.

Does 91P experience transfer beyond artillery?

Yes. Civilian employers use diesel engines, transmissions, hydraulics, suspension, steering, brakes, electrical systems, controls, and recovery equipment across construction, mining, utilities, transit, ports, manufacturing, rail, and field service. Translate the subsystems rather than the weapon platform.

Does armament maintenance grant civilian firearms or explosives authority?

No. Civilian firearms, explosives, manufacturer, warranty, engineering, and inspection work can require separate laws, licenses, employer authorization, training, and background checks. Military qualification is relevant experience, not automatic civilian authority.

What should a 91P quantify?

Quantify vehicles, engine hours, inspections, work orders, diagnostic tests, faults, engines, transmissions, hydraulic components, electrical repairs, labor hours, recoveries, turnaround time, first-time fix rate, repeat failures, people trained, safety results, and fleet availability.

Build the Maintenance Case

Turn self-propelled artillery repair into a focused civilian technical plan.

CommandPath can organize your platforms, subsystems, tests, faults, recoveries, work orders, leadership, and credential gaps.